Prayer Circles

I'm asking for prayer for my ex-friend/boyfriend. I've dated him for two years, and we broke up four months ago. He has been out of control with partying and drinking almost every night, not paying his bills, and it seems like he's on a downward spiral. I know that he has potential, and I know inside he has a sweet heart. But as of recently he's just been falling into the ways of the world and it hurts me to see him doing this to himself. He was in a bad car accident and accidently killed a man a few years back, and I'm thinking maybe its the root of the problem, he has so much guilt that I don't think he knows what to do with. I just pray that he sees what he is doing, and that someone or something will cause him to come back to the Lord.